Difficulty/Unit size.

[Martok]

I used to play on Normal all the time, but I was beginning to play on Hard more often at the time my PC died. It also partially depends on the faction I'm playing. The Eggies, for example, are easy enough that playing them on Hard is a more appropriate challange for them. On the other hand, I don't think I would *ever* play the early Armenians on anything worse than Normal -- I'm just not that masochistic.

I've pretty much always used the default unit size. They seem to be better balanced than the other sizes.